[GCM] Initial work to set up directory structure and introduce socket integration

google_apis/gcm/base/socket_stream_test_data_provider.h

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef GOOGLE_APIS_GCM_BASE_SOCKET_STREAM_TEST_DATA_PROVIDER_H_
+#define GOOGLE_APIS_GCM_BASE_SOCKET_STREAM_TEST_DATA_PROVIDER_H_
+
+#include <queue>
+#include <string>
+
+#include "base/basictypes.h"
+#include "google_apis/gcm/base/socket_stream.h"
+#include "net/socket/socket_test_util.h"
+
+namespace gcm {
+
+class SocketStreamTestDataProvider : public net::SocketDataProvider {

[Ryan Sleevi, 2013/09/03 23:04:08]

I'm not clear the motivation why you needed to do a new SocketDataProvider. Was
this purely for the async write bits? I'd like to see if we can fit this into
the existing SDPs.

That is, we've tried to fit all of the types of SocketDataProviders into
socket_test_util - static, dynamic, ordered, delayed, etc - so I'm trying to
understand what use case this is trying to address.

As best I can tell, it's closest to the Dynamic SDP, but I may be misreading,
and this may just be an instance of a Static+Delayed SDP use case.

[Nicolas Zea, 2013/09/04 00:43:33]

Ah, I missed most of those implementations. I'll take a closer look to see if I
can
just use one (or modify one slightly)

[Nicolas Zea, 2013/09/07 01:07:52]

Switched to Delayed SDP.

+ public:
+   SocketStreamTestDataProvider();
+   virtual ~SocketStreamTestDataProvider();
+
+   // net::SocketDataProvider implementation.
+  // If there's no read, sets the "has pending read" flag.  Otherwise,
+  // pops the next read.
+  virtual net::MockRead GetNextRead() OVERRIDE;
+  // Simply pops the next write and, if applicable, compares it to
+  // |data|.
+  virtual net::MockWriteResult OnWrite(const std::string& data) OVERRIDE;
+  // We ignore resets so we can pre-load the socket data provider with
+  // read/write events.
+  virtual void Reset() OVERRIDE;
+
+  // If there is a pending read, completes it with the given read.
+  // Otherwise, queues up the given read.
+  void AddRead(const net::MockRead& mock_read);
+
+  // If there is a pending write, completes it with the given write.
+  // Otherwise, queues up the given write.
+  void AddWrite(const net::MockWrite& mock_write);
+
+ private:
+  std::deque<net::MockRead> reads_;
+  bool has_pending_read_;
+
+  std::deque<net::MockWrite> writes_;
+  bool has_pending_write_;
+
+  DISALLOW_COPY_AND_ASSIGN(SocketStreamTestDataProvider);
+};
+
+}  // namespace gcm
+
+#endif  // GOOGLE_APIS_GCM_BASE_SOCKET_STREAM_TEST_DATA_PROVIDER_H_